@media screen and (min-width:@mobile-device) {

    // logo样式
    .icon {
        cursor: pointer;
        width: 17rem;
        i {
            transition: all 1s ease;
            color: rgb(255, 255, 255);
            display: block;
            font-size: @big-text;
            padding: 0 @padding-general;
        }

        img {
            display: none;
            transition: 1s all ease;
            width: 100%;
            height: auto;
        }
    }
}
@media screen and (min-width:@smallpc-device) {
    .icon {
        img {
          display: block;
          transition: all 1s ease;
        }
        i{
          transition: all 1s ease;
          display: none;
        }
      }
}